Concept — To every action there is an equal and opposite reaction.
Present in chapters
02·05
Linked atoms
24 atoms linked.
02 Forces and Newton’s laws
- Circling a system
- Two masses at the same acceleration
- Worked example — two boxes in equilibrium
- Worked example — the bulletproof vest
- The horse and the cart
- The book on the table (forces and pairs)
- Problem — Book on the table (action-reaction pairs)
- Problem — True or false on forces and motion
- Third law (action and reaction)
- Problem — One-way third law
- Problem — True or false on Newton’s laws
05 Momentum and collisions
- Problem — Car against a truck
- Huygens and the laws of collisions
- Problem — The ball that comes back
- Why is momentum conserved?
- Momentum: the principle before the law
- Problem — Rocket in a vacuum
- Impulse theorem and the fence diagram
- Problem — Third law broken
06 Centre of mass
- Problem — Explosion and total momentum
- Problem — Sci-fi physics: third law broken
- Why the centre of mass is a useful concept
- Newton’s second law for the centre of mass